Chicago Heights, IL–(ENEWSPF)– What do 350 million year old sea monsters, earrings made from tree sap, and purple crystal’s the size of a fist have in common? They will all be on display at Prairie State College’s (PSC) annual Fossil, Gem, and Mineral Show. The show will be held on Saturday, Oct. 18, and Sunday, Oct. 19, in the college’s Prairie Center gym, located at 202 S. Halsted St., Chicago Heights. Hours for the show are Saturday and Sunday, from 10 a.m. to 5 p.m. The weekend show is hosted by PSC’s Department of Natural Sciences and the South Suburban Earth Science Club (SSESC). The free family event also includes special children’s activities. Participants can view fun and exciting science demonstrations and learn about biology, chemistry, geology, and physics. Scouts can earn their geology merit badge. During the show on Saturday, NASA Ambassador Joel Knapper will present two lectures: The Phoenix Mars Landing at 11 a.m., and the Hubble Telescope, the Last Mission at 1 p.m. In addition to a spectacular display of fossils, shells, and minerals, dealers will be selling items such as jewelry, gem trees, opals, geodes, amethysts, crystals, and fluorescent stones. “Whether you’re a student, a teacher, a collector, or just doing your Christmas shopping, this is a really great chance to see and purchase some really unique items,” said Lee Anne Burrough, associate professor of Earth Science at PSC.